Why won't my chess960 games appear when I add them to my library page?

So I've had chess.com for a bit, but I just discovered library not too long ago and I'm fairly new to how it works. I wanted to add a chess960 game to one of my collections and I kept trying to add it to that collection and it wouldn't appear and save on the collection. I've tried it with multiple different collections to see if it was a glitch or smth but it was just the same thing over and over again. I tried adding different chess960 games and none of them have worked. I've also tried looking on the forums page to have a clue on what's going on but I searched and couldn't find anything. Is it just that ur not able to save any chess960/variant game? I'm really confuzzled. Can anyone help me out here?

It's a variant

I tried adding a chess960 game to my library and it worked fine. I went into the collection and found it. It was a daily chess960 game though.
I don't know what the problem would be... maybe it just doesn't like live 960 games...

I got no idea why it doesn't work

its just a fun thing/version of chess

It's the same rules of chess except the setup is different. All the pieces on the back row are mixed up. You can't just mix it up anyway though, because the King has to be in the middle of both of the Rooks. It's called chess960 because there are 960 possible starting positions.